. The Canadian field-naturalist. . Figure 9. Species cover values along the transect in the treed peatland. Species shown are those which attained at least 10% cover in one quadrat. the valley. The openness of the central zone 5 and its low nutrient status together account for the high importance of Leather-leaf and Sphag- num fuscum, as well as the relatively lesser importance of Labrador-tea and Schreber's Feather Moss which may require more shade and nutrients. Other less abundant species peaking in the central zone are Pauciflorous Sedge (Carex pauciflora). Dense Cotton-grass (Eriophorum s
. The Canadian field-naturalist. . Figure 9. Species cover values along the transect in the treed peatland. Species shown are those which attained at least 10% cover in one quadrat. the valley. The openness of the central zone 5 and its low nutrient status together account for the high importance of Leather-leaf and Sphag- num fuscum, as well as the relatively lesser importance of Labrador-tea and Schreber's Feather Moss which may require more shade and nutrients. Other less abundant species peaking in the central zone are Pauciflorous Sedge (Carex pauciflora). Dense Cotton-grass (Eriophorum spissum), and Small Cranberry (Vaccinium oxycoccos) (Appendix B*). Discussion Vegetation-Habitat Relationships In this study the term "bog" is defined as a nutrient-poor ecosystem that is Sphagnum-nch, underlain by a relatively continuous horizon of Sphagnum peat, and is relatively isolated from any influx of mineral soil-influenced waters (cf. Zoltai et al. 1974). For a bog to be ombrotro- phic it must not have present any sensitive plant indicators of minerotrophy (, see Sjors. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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